Trypticon doesn't just want to defeat his enemies - he wants to completely obliterate them from existence. If it's a bot he's battling, he wants to reduce them to scrap. Once they're scrap, he'll melt them down to sludge. Cities get reduced to rubble, then stomped to dust. Once he gets going, there are few forces in the universe that can stop him - among the Autobots, only the mighty Metroplex can stand against him in battle.